Cowl fastener



L. A. POWELL COWL FASTENER Aug. 16, 1949.

Fned sept. 28, 1942 2 Sheets-Sheet l Inu W tra.. r.

Inenor. LeonaTd'f/Zpwef 33 l gg/3 Patented Aug. 16, 1949 jur-ump flisol-Ares PAT-ENT oFFrcE Iggenaxgfovvelll Hyde Park litiasis., asignorfto; United-Carr Fastener Corporation, Gambrldga 2i exams. (c1. ziet-i211* lr l .The present invention relates .to rotary stud. fasteners oithe type common-ly Used... for oon-I meting. airplane totaling sheetstogether enel aims. generally to simplifying; and improving, existing fasteners; of that; type..

Illustrative of the invention, referenoe, made teI the accompanying. drawings. showing sex/.oral preferred embodiments, thereo and in which Flai is. a. plan view oi oneiotm oi fastener secured installation. esy viewed from. the. female fastener side;

FigfZ.l is a plan. viewttiereof. as, viewed VVtrom the opposite. orl stud fastener side.;

. Eig... 3 is, a longitudinal. sootional view of. the.. first. form of festeneres taken on the. line lie-3 of. Fis. l, but sloovvi-iug;` the stud :fully inserted .prior to being turned. to looked. position:

Eig... 4 is.- a, similar view with. the. stud in. its. looked position:

Fig. 5 is.. a transverse seotional 'view taken.' op. the line 55, foi-Fiel.;

Fig. 6 is. a horizontal. sectional. view as. taker.; (inthe-eline @669i 4.:

Eig. 7 is a sectional view similar to Fia, 3 oiY a. slightly modified .forni-of the invention;

Fig. 8 is a.. plan view similar to Fig.. 1- oi the seo. ond form of fastener esviewod. from, the female festener'side:

Fig.. 9 is o..4 plan view thereoi as viewed, trom the stud fastener sido; n

Fie. 10.- is a longitudinal .seotional View thereof as taken on the line4 10e-lll o f. l'eQ 8;

Eig. 11 is a transverse. .sectional View es. taken. onthe lino I lull of YFiel 3;

12 isa side. elevetloxi of tile temple fastener member;

Fig.` 13 is.. a. transverse sectional view thereoi as. token onthe vline ift-.I3 of FigK` l2;

Fis., 14 is a horizontal seotionalview thereof. as taken on the line. lim-t4. oi Eig.. l2; and

Fig. 15 is a longitudinal sectional. view oi o. further modieciorm .ofl fastener.

The present invention provides'novv and. ollle oient forms of female fastening members for to"` operation with. the usual rotary studs or pins hov-V ing one or moresets oradial arms, and designed to look against a relatively rigid portion of the female fastening member. Advantageously the invention includes. means` f or automatiosllv partially ejecting the stud when in unlookegiposition so that the unlocked condition of the fastener will readily be apparent toa workman or inspector. According to one form of the invention, ade dtional means are *I orovideil for resiliorltlllr hill@- 2. ing. tlio Rents.' of. the. "ip.st llatiop. floslietiget. lookedm position- ItoierrineE "more peitiolllorly to the form. of. i111.- v'option shown. ip. Etes 1; ltot liiolllisivo,v the im.- provepl fastener momen i'sshown. applied. to; a suitable support L, vvliioli'mav bp.. .one of; the. o owlipe Sheets; of; airplane 'oow1ine.;tlio.1ieiiit will; be ooderstoocifthot the invention is. `not; restricted to soph. use... oooporetine'shoot 2. vlo-iol; ils to be seolirecl to; the sheet l in. flush-tight. rolotiopslim conveniently is. apoitilrodjaset 3 in. wliioli. is ttedo. rotary stoplor p p '4: looting o, need 5 exteriorlv of the'. shoot andi peli. of. radio1. arms. 6. anni 1 iotoriorly of the, Shpeti-v CopvoprX Y ientlv the sheet 2 is ooupte'rslipk eroiir'pi. the oporture t. and: the; heeft 5: oi the.. stool t is. bovollofl so that.. in. leeliedpositipn. trie otter fate off the head will be iluso. with. tlleootor ifaoe of. the Shoot 2- 'ltie head'oi the stiid may bo slottoplxor eroovod for the reception oi' e molded; tool. 'for rotating the, stud, as is. usuel.;l L

order to iastentlie'shots. l. and. t .sooutolv toeethen thef'rotaiv .stud or, pin. isedoptod. to cooperate. and; looliwith e, female fastener memloor ottaolied, to thoreelt'foo'o oi the support or 1. and. preir'obly ttieomole fastener is. formeel. or 'elongated strip' oi'ipetalhovirig, of bas portion 8 rigidly attaz'xhedv to the sheetK I, as es: rivets 9., ',Ihe control. portion ot the loose is raised. or speoo'fl .fr'orpthe sheet i (see Fies- 3 to l) to. provide. o. pip; stm. ieoeivipe'so'et l0 which proferelolv a. rigid.' partei' 'deformation- Thorosod portion. oi the peso is povdod with e control stool-receiving. aperture lh, in registry with the aperture of. the sheet l, and. solo. aperture Il.. is preferably formed. wth. radial eloneoti'ops I2 toV admit. the passage oiradielpin arios. Bend l- 'lho seat il! preferably is further, formed. with stop moans i3 spotted offlosirotldistonoo from.

the eloneatiops. lL as. for exemple 9,0" therefrom Y and advantaeeopslvjttloso S1101? moons. aro formed. lor` outwardly heroine, 'portions out from the miisod.

portion, andserv'ing to provide an abutmentto limit-rotation of the stilo to ov desired angular preferably in alignment with the aperture Ill and radial elongations I2 of the raised seat portion Il) of the base. The end of the spring, on opposite sides of the opening I1, is formed with spaced raised portions I8 and an intermediate pin-receiving seat I9 for the reception of the radial pin arms 1 when-the stud is rotated to locked position. Y

When the stud 4 is applied to the female fastener member and rotated to lo-cked position, as shown in Fig. 4, the interengaging spring arm and stud pin arms 1 provide supplemental resilient tension for holding the parts -in assembled locked position as well as to provide a yieldable seat for the supplemental pin arms 1 tending to resist accidental rotation or unlocking of the stud, such as may be caused by vibration of the parts I and 2.

It will be understood that the base portion 8 of the female fastener may be att-ached to the support I in any suitable manner, and when it is desirable to rivet the base to the support in regions underlying an overlying spring' arm, the spring arm may be vapertured as at |34, for the passage of the rivet and riveting tool.

According to one feature of the invention, it is desirable to provide means for automatically partially ejecting the stud when in unlocked position, so that the condition of the fastener will be readily apparent to the workman or inspector, merelyby observation. This may be accomplished by providing a spring arm extension 20 connected to and extending from the base 8 and overlying Ythe stud-receiving aperturesoutwardly of `the base, as shown in Fig.` 7. When the stud 4 is in locked position in thefastener as shown in Fig. 7,

the spring arm 2l]V is Aunder tension. When the stud is in unlocked position with the pin arms 6 and 1 aligned with the elongations of the openings II and I1 respectively, the spring 20 forces the stud inwardly, partially ejeoting the stud, so that the head lis forced out of the counter-sunk recess in the sheet il, thusproviding an effective visual indication that thefastener is unlocked.

Y In the embodiments of the invention shown in the drawings,lI have illustrated alternative ways of accomplishing the above stated advantages with rotary stud members having a single pair of radial pin arms 6.

Referring to the form of fastener shown in Figs. 8 ,to 14 inclusive, the female fastener member comprises an elongated metal strip having a base portion 25 adapted to be secured to one face of the support I as by rivets 25, and provided with a stud-receiving aperture 21 having radial elongations 28.to admit the stud or pin and radial pin arms 6 (see Fig. 14). Marginal portions of the aperture 21 are anged outwardly, as at 29, to form a rigid pin arm-receiving seat 3U Vto be engaged by the arms 6 upon rotation of' the stud 4. The iianges ZSmay be formed with raised portions 3l to serve as stop means to limit rotation of the stud to a predetermined 'angular position. Y

A spring Vmember 32 overlies the base 25 and preferably this spring member is integral with the -base being vconnected to one end portion thereof by a bight portion 33. The spring portion is formed with an aperture 34 of a size at least coextensive with the aperture 21 Vand elongations V28. l Y

The spring member 32 is preferably bowed to provide spaced portions 35 and 36 having a sliding bearing on the base 25 and an intermediate arched pin arm-receiving portion 31 normally spaced above the seat 30 and adapted to be engaged and compressed by the arms 6 upon rotation of the stud to locked position, and thus provide a supplemental resilient tension on the studt to hold the parts l and 2 together. Preferably the arched portion of the spring is formed withl a dished seat 38 disposed transversely of the aperture 34 to receive and hold the pin arms 6 against` accidental rotation in locking direction.

The spring member 39 is preferably integrally connected to another portion of the base 25 anda extends outwardly and rearwardly to a positionoverlying and bearing against the nose end of thel stud 4, providing sufficient resilient tension to automatically partially eject the stud when in unlocked position.

A further modied form of the invention for use with a stud having a single pair of radial arms 6 is illustrated in Fig. 15. In this form the base 8 and seat portion I of the female fastener may be like that illustrated in Figs. 1 to '1 inclusive. The stud ejecting spring `arm 20 engages the end ofV the stud, as in Fig. 7, and is also formed with an inturned portion 2l engaging a at or recessed face 6a of the nose end of the stud 4 which serves to resist accidental rotation of the stud to unlocking direction.

Although I have illustratedV and described preferred embodiments of my invention, I do not wish to be limited thereby because the scope of my invention is best deined by the following claims.

I claim: 1. A cowling fastener Iof the rotary stud type for securing a support and a member tobe attached thereto together, comprising a stud member rotatably mounted to the attaching member and provided with radially etxending pin arms, the end of said stud being provided with a rounded. nose and a. non-cylindrical side portion adjacent said nose, and a female fastening member comprising a metal strip having a base and an apertured raised pin arm-receiving portion adapted to receive and' be engaged by said pin arms, and a spring member connected to said base and overlying the rounded nose end of said stud and engaging the non-cylindrical side portion thereof, for resisting turning movement of the stud when in lockedposition and. partially ejecting said stud when in unlocked position.

2. A Cowling fastener of the rotary stud type for securing a support and a member to be attached thereto together, comprising a stud member rotatably mounted on the attaching member and provided with radially extending pin arms, the end of said stud being provided with a rounded nose and a recessed flattened side portion adjacent said nose, and a fem-ale fastening member comprising a metal strip having a base and an apertured raised pin arm-receiving portion adapted to receive and `be engaged by said pin arms, and a spring member connected to said baseY and overlying the rounded nose endof said stud and engaging the recessed attened side portion thereof, for resisting turning movement of the stud when in locked position and partially ejecting said stud when in unlocked position.

LEONARD A. POWELL.

REFERENCES CITED The following references are of record in the le of this patent:

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